move available .ar synth list to scroll list
1.1. double click invokes particle creation
1.2. particle creation creates a node view in the panel right to World view (with [x] button for removing the particle and feeing the synth)
create a panel for active synths view (synthsPanel)
2.1. a click in this panel makes a synth active and displays its params
GUI for control params (based on XSession layout)
3.1. connect control params to MIDI
create infrastructure in envi.scd and synths.scd for synths' params management:
4.1. list of params for each synth (list of dicts?)
4.2. named/numbered presets for each synth
4.3. possibility to save a preset and automatically assign it to a synth/particle creation in a sequence
equal vertical space of the boxes in synthsPanel
draw lines connecting node boxes in synthsPanel with actual particles in the World view